QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #578165 | #8339. Rooted Tree | Okuchiri# | AC ✓ | 1256ms | 3704kb | C++20 | 841b | 2024-09-20 17:06:25 | 2024-09-20 17:06:26 |
Judging History
answer
#include<bits/stdc++.h>
#define ll long long
#define int long long
using namespace std;
const ll mod=1000000009;
ll ksm(ll x,ll y)
{
ll res=1;
x=x%mod;
while(y)
{
if(y&1)res=res*x%mod;
x=x*x%mod;
y=y/2;
}
return res;
}
ll m,k,r;
ll f[101][101];
signed main()
{
ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
cin>>m>>k;
ll ans=0,s=0,now=1,res=1;
for(ll i=1;i<=k;i++)
{
ll e=s*ksm(res*now,mod-2)%mod;
ans=(ans*now%mod+((e+1)*res%mod*(now)%mod)%mod*m%mod)%mod;
s=(s*(now-1+mod)%mod+((e+1)*res%mod*(now)%mod)%mod*m%mod)%mod;
//cout<<ans<<' '<<s<<' '<<now<<' '<<res<<'\n';
res=res*now%mod;
now=(now+m-1)%mod;
}
//res=res*ksm(now,mod-2)%mod;
cout<<ans*ksm(res,mod-2)%mod;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3656kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3600kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 78ms
memory: 3576kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 843ms
memory: 3664kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3644kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 917ms
memory: 3660kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 515ms
memory: 3596kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1246ms
memory: 3564kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 227ms
memory: 3588kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 680ms
memory: 3648kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 403ms
memory: 3648kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 367ms
memory: 3668kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 1076ms
memory: 3628kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1251ms
memory: 3660kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1256ms
memory: 3704kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1252ms
memory: 3628kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed